4053446521 has 6 divisors (see below), whose sum is σ = 4141527290. Its totient is φ = 3967200816.

The previous prime is 4053446513. The next prime is 4053446549. The reversal of 4053446521 is 1256443504.

It can be written as a sum of positive squares in only one way, i.e., 3244897296 + 808549225 = 56964^2 + 28435^2 .

It is not a de Polignac number, because 4053446521 - 2³ = 4053446513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4053446321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 915276 + ... + 919693.

Almost surely, 2^4053446521 is an apocalyptic number.

It is an amenable number.

4053446521 is a deficient number, since it is larger than the sum of its proper divisors (88080769).

4053446521 is an equidigital number, since it uses as much as digits as its factorization.

4053446521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835063 (or 1835016 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 4053446521 is about 63666.6829746925. The cubic root of 4053446521 is about 1594.4398829902.

The spelling of 4053446521 in words is "four billion, fifty-three million, four hundred forty-six thousand, five hundred twenty-one".